Riyadh to Phoenix Time
AST to MST Converter — 9 AM AST is 11:00 PM MST
Riyadh is 10 hours ahead of Phoenix. Convert any time between Riyadh (AST) and Phoenix (MST) instantly.
Riyadh
Saudi Arabia
Phoenix
United States
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Time Zone Comparison
Riyadh to Phoenix Time Conversion Table
| Riyadh (AST) | Phoenix (MST) |
|---|---|
| 12:00 AM | 2:00 PM |
| 2:00 AM | 4:00 PM |
| 4:00 AM | 6:00 PM |
| 6:00 AM | 8:00 PM |
| 8:00 AM | 10:00 PM |
| 10:00 AM | 12:00 AM |
| 12:00 PM | 2:00 AM |
| 2:00 PM | 4:00 AM |
| 4:00 PM | 6:00 AM |
| 6:00 PM | 8:00 AM |
| 8:00 PM | 10:00 AM |
| 10:00 PM | 12:00 PM |
Riyadh & Phoenix — Business & Scheduling Guide
Riyadh (Saudi Arabia) is the largest economy in the Middle East, with key industries in oil & gas, construction, finance, and tourism under Vision 2030. Phoenix (United States) is a global financial and tech hub, known for technology, finance, healthcare, and entertainment. With a 10-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Riyadh and Phoenix
With Phoenix 10 hours behind Riyadh, there is minimal overlap in standard business hours. Most teams alternate meeting times to share the burden of early-morning or late-evening calls fairly. Saudi business hours typically run 9 AM–5 PM Sunday–Thursday, with business often conducted over meals. US business hours typically run 9 AM–5 PM, with a culture that values punctuality and efficiency. Consider recording meetings for those who can't attend live, and use shared documents for async collaboration.
Daylight Saving Time Considerations
Neither Riyadh nor Phoenix observes Daylight Saving Time — Riyadh stays on AST and Phoenix stays on MST year-round. This makes scheduling between these two cities simpler, as the 10-hour time difference remains constant throughout the year with no DST surprises.
AST to MST — Quick Reference
AST (AST) stands for the timezone used in Riyadh, Saudi Arabia (UTC+3). MST (MST) is the timezone used in Phoenix, United States (UTC-7). Riyadh is 10 hours ahead of Phoenix.
To convert AST to MST, subtract 10 hours from AST time. For example, AST 9:00 AM = MST 11:00 PM (previous day).
Key Facts
- •Time difference: Riyadh (UTC+3) is 10 hours ahead of Phoenix (UTC-7).
- •Daylight Saving Time: Riyadh does not observe DST (AST). Phoenix does not observe DST (MST).
- •Regions: Riyadh is located in Saudi Arabia and uses the AST time zone. Phoenix is located in United States and uses the MST time zone.
- •Best time to call: There are no overlapping standard work hours (9 AM - 5 PM) between these two cities.
Frequently Asked Questions
What is the time difference between Riyadh and Phoenix?
Riyadh is 10 hours ahead of Phoenix.
What time is it in Phoenix when it's 9 AM in Riyadh?
When it's 9:00 AM in Riyadh, it is 11:00 PM in Phoenix (previous day).
What time is 9 PM AST in MST?
9 PM AST (Riyadh time) is 11:00 AM MST (Phoenix time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Riyadh and Phoenix?
There are no overlapping standard work hours (9 AM - 5 PM) between these two cities.
How do I convert AST to MST?
AST (AST) is the timezone for Riyadh, Saudi Arabia (UTC+3). MST (MST) is the timezone for Phoenix, United States (UTC-7). Riyadh is 10 hours ahead of Phoenix. Quick examples: 9 AM AST = 11:00 PM MST, 12 PM AST = 2:00 AM MST, 3 PM AST = 5:00 AM MST, 6 PM AST = 8:00 AM MST.
Is Riyadh ahead of or behind Phoenix?
Riyadh is 10 hours ahead of Phoenix. When it's noon in Riyadh, it's 2:00 AM in Phoenix.
Does Riyadh or Phoenix change clocks for Daylight Saving Time?
No, Riyadh does not observe DST — it stays on AST year-round. Phoenix does not observe DST — it stays on MST year-round.
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